Mensurationmedium · Past Paper
If the length of the diagonal of a cube is sqrt(3) * 10 cm, what is its total surface area?
A300 cm²
B600 cm²
C100 cm²
D400 cm²
✓ Correct Answer: B — 600 cm²
Diagonal of cube = sqrt(3)l. So l = 10 cm. TSA = 6l² = 6 * 100 = 600 cm².
Share this question
More from Mensuration
- A metallic sphere of radius 10.5 cm is melted and then recast into small cones, each of radius 3.5 cm and height 3 cm. Find the number of cones.
- The surface area of a sphere is 5544 sq. cm. Its volume is:
- A sphere and a cube have the same surface area. What is the ratio of the radius of the sphere to the side of the cube?
- A sphere, a cylinder and a cone have the same radius and same height. Find the ratio of their volumes.
- The perimeter of the base of a right circular cylinder is 44 cm and its height is 10 cm. Find its curved surface area.